import _defineProperty from 'babel-runtime/helpers/defineProperty';
import _classCallCheck from 'babel-runtime/helpers/classCallCheck';
import _possibleConstructorReturn from 'babel-runtime/helpers/possibleConstructorReturn';
import _inherits from 'babel-runtime/helpers/inherits';
import React, { Component } from 'react';
import PropTypes from 'prop-types';
import ReactDom from 'react-dom';
import classnames from 'classnames';

var scrollTo = function scrollTo(element, to, duration) {
  var requestAnimationFrame = window.requestAnimationFrame || function requestAnimationFrameTimeout() {
    return setTimeout(arguments[0], 10);
  };
  // jump to target if duration zero
  if (duration <= 0) {
    element.scrollTop = to;
    return;
  }
  var difference = to - element.scrollTop;
  var perTick = difference / duration * 10;

  requestAnimationFrame(function () {
    element.scrollTop = element.scrollTop + perTick;
    if (element.scrollTop === to) return;
    scrollTo(element, to, duration - 10);
  });
};

var Select = function (_Component) {
  _inherits(Select, _Component);

  function Select() {
    var _temp, _this, _ret;

    _classCallCheck(this, Select);

    for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
      args[_key] = arguments[_key];
    }

    return _ret = (_temp = (_this = _possibleConstructorReturn(this, _Component.call.apply(_Component, [this].concat(args))), _this), _this.state = {
      active: false
    }, _this.onSelect = function (value) {
      var _this$props = _this.props,
          onSelect = _this$props.onSelect,
          type = _this$props.type;

      onSelect(type, value);
    }, _this.handleMouseEnter = function (e) {
      _this.setState({ active: true });
      _this.props.onMouseEnter(e);
    }, _this.handleMouseLeave = function () {
      _this.setState({ active: false });
    }, _this.saveList = function (node) {
      _this.list = node;
    }, _temp), _possibleConstructorReturn(_this, _ret);
  }

  Select.prototype.componentDidMount = function componentDidMount() {
    // jump to selected option
    this.scrollToSelected(0);
  };

  Select.prototype.componentDidUpdate = function componentDidUpdate(prevProps) {
    // smooth scroll to selected option
    if (prevProps.selectedIndex !== this.props.selectedIndex) {
      this.scrollToSelected(120);
    }
  };

  Select.prototype.getOptions = function getOptions() {
    var _this2 = this;

    var _props = this.props,
        options = _props.options,
        selectedIndex = _props.selectedIndex,
        prefixCls = _props.prefixCls;

    return options.map(function (item, index) {
      var _classnames;

      var cls = classnames((_classnames = {}, _defineProperty(_classnames, prefixCls + '-select-option-selected', selectedIndex === index), _defineProperty(_classnames, prefixCls + '-select-option-disabled', item.disabled), _classnames));
      var onclick = null;
      if (!item.disabled) {
        onclick = _this2.onSelect.bind(_this2, item.value);
      }
      return React.createElement(
        'li',
        {
          className: cls,
          key: index,
          onClick: onclick,
          disabled: item.disabled
        },
        item.value
      );
    });
  };

  Select.prototype.scrollToSelected = function scrollToSelected(duration) {
    // move to selected item
    var select = ReactDom.findDOMNode(this);
    var list = ReactDom.findDOMNode(this.list);
    if (!list) {
      return;
    }
    var index = this.props.selectedIndex;
    if (index < 0) {
      index = 0;
    }
    var topOption = list.children[index];
    var to = topOption.offsetTop;
    scrollTo(select, to, duration);
  };

  Select.prototype.render = function render() {
    var _classnames2;

    if (this.props.options.length === 0) {
      return null;
    }

    var prefixCls = this.props.prefixCls;

    var cls = classnames((_classnames2 = {}, _defineProperty(_classnames2, prefixCls + '-select', 1), _defineProperty(_classnames2, prefixCls + '-select-active', this.state.active), _classnames2));

    return React.createElement(
      'div',
      {
        className: cls,
        onMouseEnter: this.handleMouseEnter,
        onMouseLeave: this.handleMouseLeave
      },
      React.createElement(
        'ul',
        { ref: this.saveList },
        this.getOptions()
      )
    );
  };

  return Select;
}(Component);

Select.propTypes = {
  prefixCls: PropTypes.string,
  options: PropTypes.array,
  selectedIndex: PropTypes.number,
  type: PropTypes.string,
  onSelect: PropTypes.func,
  onMouseEnter: PropTypes.func
};


export default Select;